My old cat hisses at new kitten and me. How can I introduce them?

I would try a Feliway spray, diffuser or collar. It is a pheromone that helps with relaxation and anxiety. There are also supplements for anxiety. Set up separate areas for feeding and two litter boxes so they each have their own space with an area that they both have access to. Usually over time they will adjust if left alone. If she’s still aggressive there are prescription medications to give her for a little while to help her adjust so please discuss this with your veterinarian. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Kaji.

I'm sorry to hear that Nala is having a hard time with the introduction of a new kitten. It certainly sounds like she is experiencing some anxiety as a result of having a new kitten added to her household. Since it sounds like you have done a good job of introducing Simba gradually and Nala is still not tolerating him, you might need to find some ways to decrease her stress. One option for decreasing stress is to add a Feliway Diffuser ( https://www.feliway.com ) to your house. This is a calming pheromone that will work for a month and may be beneficial for both cats. I have also had luck with Rescue Remedy ( http://www.bachflower.com/rescue-remedy-pet/ ) which can be added to the water. You could also consider calming music specifically for cats ( http://throughadogsear.com/tace/through-a-cats-ear-1-music-for-calming/ ). If Nala continues to hide in your bedroom, it may be time to take her to your veterinarian for a physical exam and discussion about possible anti-anxiety medication short-term. Hopefully if you can get her more comfortable around Simba, they can have a good relationship, but it commonly takes some time. Good luck! I hope that was helpful. Thanks for using PetCoach.

I would recommend getting a Feliway diffuser to help settle the cats while this introduction goes on. Jazzmin may be showing misdirected aggression if she smells the kitten on you. Here are some articles to try to help make introduction go smoothly. https://www.vca.com/news/introducing-kittens-older-cat/ https://vcahospitals.com/know-your-pet/bringing-home-your-new-kitten https://www.feliway.com/ http://www.peteducation.com/article.cfm?c=1 2137

Separate Lilly from the kitten for a few days. Gradually reintroduce them. Start with a closed door between them so they can hear and smell each other. Progress to seeing each other but without physical contact. Once they are acclimated, try short periods of supervised contact. Use a pheromone prodcut such as Feliway Spray or the plug in diffuser to decrease any anxiety or aggression.

It may take time for Lilly to accept your other cat even though she is the smaller new cat. Some cats just don't do well together so if this behavior continues or gets worse I would recommend either talking to a veterinary behaviorist (if there is one in your area) or considering finding someone who can provide Lilly a great life as an only cat. Thank you for using Petco Pet Education Center, formerly Petcoach.

It does take time for the existing cat to get used to a new addition to the house, and I recommend introducing them slowly to each other. Take the kitten, and put her in her own room with her own food, water, and litter box. Keep the door closed, and for a few days, feed them both treats on other side of door so they associate each other's smell with a good experience. Then let the other cat in the kitten's room while the kitten is in a cat carrier. They can smell each other, but not be in contact. If either becomes upset or show signs of aggression, remove the second cat from the room, and try again later. Praise them when they interact appropriately. When they are interacting well with each other through the carrier, you can let the kitten out of her room, and see how she interacts with the other cat. Praise them when they interact appropriately, and separate them with any sign of aggression or upset. I would get a cat tree with lots of shelves to give the cats vertical space to get away from each other. I would keep the kitten in her room when you go out until they are comfortable with each other.

Introducing a new cat into a household can be very stressful. Cats do not try to act masculine, but another person can certainly change the dynamic of any relationship. I would recommend finding ways to decrease stress in the house. One option for decreasing stress is to add a Feliway Diffuser ( https://www.feliway.com/us#redirected ) to your house. This is a calming pheromone that will work for a month and may be beneficial for both cats. I have also had luck with Rescue Remedy ( http://www.bachflower.com/rescue-remedy-pet/ ) which can be added to the water. Again, this may be beneficial for both cats. If Bear continues to hiss and growl despite these additions, it may be time to take him to your veterinarian for a physical exam and discussion about possible anti-anxiety medication. Good luck! I hope that was helpful. Thanks for using PetCoach.